DiagnoSe is a DS function tester, designed to test the features of the DS.

Using the stylus to navigate the menu, from the top left you have –

1. Test Buttons
2. Test Stylus
3. Test Wifi
4. Boot GBA
5. Test Microphone
6. Test Speakers
7. Fix stuck pixels
8. Test screen lights
9. Test motion card/pak/mk6 motion
10. Test rumble pak
11. Test DLDI FAT
12. Credits

http://www.neoflash.com/forum/index.php/topic,4356.0.html